EP0417704A1 - Eine, ein Druckabnahmesignal erzeugende Ventilkappe für einen Luftreifen - Google Patents

Eine, ein Druckabnahmesignal erzeugende Ventilkappe für einen Luftreifen Download PDF

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Publication number
EP0417704A1
EP0417704A1 EP90117410A EP90117410A EP0417704A1 EP 0417704 A1 EP0417704 A1 EP 0417704A1 EP 90117410 A EP90117410 A EP 90117410A EP 90117410 A EP90117410 A EP 90117410A EP 0417704 A1 EP0417704 A1 EP 0417704A1
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EP
European Patent Office
Prior art keywords
valve cap
valve
pressure
tire
cap according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90117410A
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German (de)
English (en)
French (fr)
Inventor
Rainer Achterholt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0417704A1 publication Critical patent/EP0417704A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0491—Constructional details of means for attaching the control device
    • B60C23/0496—Valve stem attachments positioned outside of the tyre chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3584—Inflatable article [e.g., tire filling chuck and/or stem]
    • Y10T137/3662—With gauge or indicator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3584—Inflatable article [e.g., tire filling chuck and/or stem]
    • Y10T137/374—With cap

Definitions

  • the invention relates to a valve cap generating a pressure decrease signal for a pneumatic tire equipped with a valve.
  • the valve cap is preferably intended for use on passenger car tires which are operated at a target tire pressure of approximately 1.4 to 3.0 bar. Modified embodiments are provided for bicycle tires, motorcycle tires and truck tires.
  • the essential components of the new valve cap include a housing that can be screwed onto a valve tube of the tire valve.
  • An actuator is provided which opens the tire valve when the valve cap is screwed onto the valve tube.
  • a pressure chamber which can be acted upon by the tire pressure to be monitored and a reference chamber which can be acted upon by a predetermined desired pressure when the valve cap is screwed onto the tire valve are formed within the valve cap housing. Both chambers are separated from each other by a membrane, which assumes a position deflected into the pressure chamber when the pressure to be monitored drops below the target pressure.
  • valve cap of this type and function is known from German Patent 35 46 338.
  • a housing section delimiting the pressure chamber is transparent.
  • An approximation the preferably colored membrane on this transparent housing section is visually perceptible and serves as an indication of a decrease in pressure.
  • the driver must check each individual valve cap, which can only be done when the vehicle is stationary.
  • the well-known mode of operation which automatically creates and permanently stores a reference pressure when a valve cap is screwed onto the tire valve, has proven to be particularly simple, robust and reliable.
  • a single embodiment of the valve cap can be used at a wide variety of tire pressures because only a pressure difference is determined.
  • the membrane can therefore be made thin and highly sensitive.
  • the fluctuations in tire pressure that occur when a car is used as intended can be 0.3 bar and more. Such pressure fluctuations do not change the reference pressure within the reference chamber, which serves as a reference, and cannot impair the display and display accuracy of such a valve cap.
  • a spring-loaded membrane which is not permitted, serves as the pressure detection means high or low tire pressure operated a switch, whereupon the transmitter is activated. As long as there is an impermissible tire pressure, the transmitter remains activated and draws energy from the supply source. There are doubts whether this proposal can be implemented or has already been implemented.
  • the object of the present invention is to provide a valve cap of the type mentioned at the outset which is simple in construction and which can be produced inexpensively and which - while maintaining the advantages mentioned above - enables reliable and interference-free wireless signal transmission.
  • the valve cap equipped with a transmitter and with a power source should have small dimensions, continue to be fixable solely by screwing onto the tire valve, and be light in weight in order to avoid any noteworthy imbalance of a pneumatic tire equipped with this valve cap.
  • valve cap should be simple and consist of as few prefabricated components that can be handled independently of one another, from which the finished valve cap can be produced by automated mass production.
  • the new valve cap is intended to be used without replacing the power source and / or others Modification may be suitable for repeated use and guarantee a service life of several years.
  • the solution according to the invention of this object and objectives is characterized in that a circuit board is present within the valve cap housing, to which electrical and / or electronic components of a transmitter are attached, which are connected to the power supply generates one or more signal frequencies which can be transmitted wirelessly to a receiver arranged adjacent to the pneumatic tire.
  • a decrease in the tire pressure to be monitored compared to the target pressure stored in the reference chamber causes a membrane deflection which closes the switching element, whereupon a circuit is closed which activates the switching of the transmitter.
  • the transmitter has a sequence control, which interrupts this signal transmission after a short signal transmission and puts the transmitter into a standby state again.
  • valve cap This combination of features results in a simply constructed and reliably working valve cap with small dimensions, which wirelessly transmits a signal to a receiver, which is preferably housed in the area of the wheel suspension.
  • a practical embodiment of this valve cap has a length (in the direction of the valve axis) of approximately 20 mm and a diameter of approximately 20 mm and weighs less than 10 g.
  • This valve cap can be equipped with a lithium battery that supplies a nominal voltage of 3 V and has a capacity of mAh; this battery power is sufficient for at least 500 to 1000 alarm pulses due to the limitation of the duration of the signal transmission.
  • the valve cap is simple constructed and consists of a few prefabricated, independently manageable components, from which the finished valve cap can be produced by automated mass production.
  • the transmitter preferably generates two signal frequencies with different frequencies, which are alternately emitted with a predetermined pulse sequence.
  • a correspondingly tuned receiver is assigned to each transmitter / valve cap, the maximum distance between receiver and transmitter preferably being less than 1000 mm. Under these conditions, a false alarm as a result of third-party shipments and / or the interference of other recipients can practically be ruled out.
  • the various tires of a motor vehicle can be equipped with the same embodiment of a valve cap, because the assignment to the respective wheel is made via the respective receiver.
  • valve cap for producing a membrane deflection with sufficient pressure decrease in the pneumatic tire
  • DE-PS 35 46 338 The basic, mechanical-structural design of the valve cap according to the invention for producing a membrane deflection with sufficient pressure decrease in the pneumatic tire.
  • the content of this publication should - as far as helpful and necessary - also be made part of the present documents with this reference.
  • a 3-stage seal is created. In a first stage, a pressure-tight seal is created between the valve tube and the open housing end of the valve cap.
  • a compressible sealing element can be present within the open housing end, and / or the valve cap housing is made of plastic, which lies tightly and pressure-tight on the external thread of the valve tube.
  • the actuator present on the valve cap presses against the tire valve tappet, adjusts it against its spring pressure and opens the tire valve.
  • pressure medium flows out of the tire into the interior of the housing of the Ven cap and applies both the reference chamber and the pressure chamber with the current tire pressure, which corresponds to a predetermined tire pressure.
  • the reference chamber is closed pressure-tight. As practical experience has shown, the reference chamber remains closed pressure-tight for months and maintains the set pressure once specified.
  • the reference chamber is formed within a can closed on one side, the can opening of which is closed by the membrane.
  • This can is delimited by a can bottom and a can peripheral wall which has an end face.
  • the can interior is pressurized via at least one channel recessed within the can peripheral wall, which begins at the end face of the can peripheral wall and opens into the interior of the can.
  • This can is slidably held within the housing, and when screwing on the valve cap on the tire valve tube, the can end face is pressed against a seal which is fixedly attached within the valve cap housing.
  • the interior of the can and thus the reference chamber are securely closed.
  • valve cap When the valve cap is unscrewed from the tire valve, the contact pressure between the can end face and the seal is released.
  • An elastic member housed within the valve cap provides a separation between the seal and the end face of the can, so that the reference chamber can again be subjected to a different set pressure, if necessary.
  • the transmitter provided according to the invention essentially consists of a digital circuit and an oscillating circuit, the coil of which is designed as a transmitting antenna. According to an essential aspect of the present invention, such a sequence control of the digital circuit is provided, which interrupts this signal transmission again after a short signal transmission and the transmitter again in one Ready status set.
  • the digital circuit as essential functional groups can preferably have an RC generator, a starting device (trigger), a modulation circuit, a multi-stage frequency divider and a power amplifier that can be switched on and off.
  • the RC generator (oscillator) delivers various signal frequencies, the respective frequency of which is determined by the components resistor (R) and capacitor (C).
  • the circuit is constructed in such a way that the corresponding function groups of the digital circuit are controlled by various feedbacks from the frequency divider in such a way that the circuit is started by closing the switching element and a complete signal transmission is carried out. Once this has been done, the power amplifiers and the RC oscillator are switched off, which leads to a very substantial reduction in the power drawn from the battery.
  • the circuit is switched back to standby and is ready for transmission for a new signal output, even if the switching element remains closed.
  • a renewed signal output occurs only after the membrane has been reset and the switching element has been opened and is closed again when a decrease in tire pressure is detected again.
  • the transmission signal is preferably emitted at comparatively long-wave frequencies in the kHz range. In this area, hardly any interference from external signal sources is to be expected. Nevertheless, interference-free transmission of the transmission signal to the receiver (s), preferably not more than 1000 mm away, can be achieved in the wheel area of the vehicle.
  • the transmission signal preferably consists of two different frequencies (for example 9.6 kHz and 10.4 kHz), which alternate over a period of 10 up to 20 milliseconds.
  • the total duration of a transmission signal is preferably only a few seconds, for example 1 to 3 seconds and particularly preferably approximately 1.6 seconds. Under these conditions, the capacity of the lithium battery specified above is sufficient for at least 500 to 1000 alarm pulses, ie for the entire expected service life of the valve.
  • the entire transmitter with all electrical and / or electronic components is preferably designed as a module.
  • the components including two chips, an RC generator, and a number of capacitors and resistors are located on a circuit board that forms a printed circuit.
  • a round circuit board with a diameter of approximately 17 mm is sufficient to hold all of the components.
  • This circuit board with the components is protected inside a plastic sleeve, on the outer circumference of which - in a groove - the transmitter coil, which is designed as a wire winding, is attached.
  • the entire signal generating device including the reference chamber with switching element, transmitter and battery preferably forms a single integrated component. This entire component is slidably held within the valve cap housing. Short and stable electrically conductive connections can be realized on this combined component.
  • the assembly of the valve cap is made easier because all small and / or sensitive components of the transmitter as well as the sensitive membrane are located on a single, prefabricated component.
  • Each valve cap with its transmitter is assigned its own receiver.
  • Each receiver typically has a ferrite rod with a receiving antenna and a known receiver circuit.
  • the receiver circuit is powered by the vehicle's power source.
  • the outputs of the receiver circuit are connected via connecting lines to a display device on the dashboard or the like of the vehicle.
  • To display direction belongs to evaluation electronics, which assigns the impulses originating from a certain transmitter / receiver to the associated wheel display.
  • the display device generates its optically and / or acoustically perceptible warning signal in response to the pulses received by the receiver, which warning signal remains even after the transmission of signal frequencies has ended until the vehicle driver has deleted or reset the warning display.
  • valve cap After an alarm pulse has been sent, the valve cap is again ready to send a new alarm pulse after the membrane has returned to its rest position. This can be done in particular by unscrewing the valve cap from the tire valve, because then the access to the reference chamber is opened and a pressure equalization or a new setting of a target pressure can take place.
  • the electrical and / or electronic components and components present in the valve cap according to the invention are supplied with current / voltage from a power supply source, preferably a button cell.
  • the digital circuit of the transmitter is usually in a standby state.
  • This circuit is linked to a mechanical, normally open switching element, to which a conductor section belongs, which is located within the pressure chamber and is fixedly arranged there at a short distance from the rest position of the membrane. A sufficient decrease in the pressure in the tire and thus also in the pressure chamber causes the membrane to deflect into the pressure chamber. This membrane deflection creates an electrically conductive connection between this conductor section and a further contact of the switching element, whereupon a circuit is closed which activates the transmitter circuit.
  • the deflectable membrane itself from an electrically conductive material and to use it as a movable contact of the switching element.
  • it can it is difficult to combine sufficient electrical conductivity with the desired elasticity and mechanical strength and durability of the membrane material.
  • a non-conductive membrane material made of plastic or rubber with the desired elastic properties with an electrically conductive coating.
  • this coating can impair the sensitivity, durability and / or the response behavior of the membrane.
  • a membrane made of plastic or rubber material that is optimal with regard to its elastic and mechanical properties, and to cover this membrane on its surface adjacent to the conductor section with a thin electrically conductive plastic film.
  • This electrically conductive plastic film can, for example, be a conductive polycarbonate film filled with carbon black (which is sold by BAYER AG under the trade name MAKROFOL). A layer thickness of this polycarbonate film of about 35 is sufficient and well suited.
  • This electrically conductive plastic film is preferably punched out in a circle and has an edge-connected terminal lug, which is connected in an electrically conductive manner to the terminal contact of the switching element.
  • This electrically conductive plastic film is preferably provided with a number of radial incisions starting from the film center and not reaching the film edge; for example, two cuts intersecting at right angles are well suited. Thanks to these incisions, the presence of this electrically conductive plastic film lying directly on the membrane and clamped at its edge does not hinder the membrane deflection.
  • an electrically conductive metal plate or a metal ring is attached in the center of the membrane, which is electrical via a thin metal wire is conductively connected to the transmitter circuit.
  • This metal plate / metal ring does not affect the membrane deflection and forms a simple and robust movable contact of the switching element.
  • a mechanically movable switching element is created which practically does not oppose a membrane deflection.
  • the sensitivity and the response behavior of the membrane is not impaired by integrating the membrane into an electrical switching device. Rather, a mechanical switch that works practically without back pressure is created, which works safely and reliably on a rotating wheel even under the difficult and changing forces. Try with.
  • the valve caps according to the invention have shown that this design of the membrane and the switching element reliably and reproducibly detects a decrease in the tire pressure of at least 0.2 bar and then activates the transmitter.
  • a membrane deflection of a few 1/10 millimeters is sufficient to close the switch and to supply the transmitter circuit with current / voltage.
  • the conductor section located within the pressure chamber can preferably consist of a metal bracket which is attached at opposite points to the section of the can peripheral wall which projects beyond the membrane and is oriented essentially parallel to the membrane.
  • This metal bracket is arranged a few 1/10 mm away from the membrane or from the electrically conductive plastic film carried by the membrane or from the metal plate carried by the membrane. The arrangement of the conductor section parallel and at a short distance from the membrane requires little height and provides a quickly and reliably responsive switch.
  • valve cap according to the invention shows a schematic Sectional view of a valve cap according to the invention.
  • the valve cap shown in the figure has a housing 1 closed on one side, with a cover 2 and a cylindrical circumferential wall 3, which merges in steps into an integrally molded sleeve section 4, on the inner circumference of which an internal thread 5 is formed.
  • This sleeve section 4 forms the open end of the valve cap, which can be screwed onto a tire valve, of which in the present case only a section of a valve tube 6 and a spring-loaded valve tappet 7 is shown.
  • the valve tube 6 is provided with an adapted external thread.
  • the entire valve cap housing 1 is preferably made of impact-resistant plastic.
  • a pressure plate 10 is displaceably guided on the gradation between the peripheral wall 3 and the sleeve section 4, from which an actuating member 12, which is approximately aligned with the longitudinal axis of the valve cap, projects in one piece.
  • this actuator 12 hits the valve tappet 7 and presses it down against its spring load, so that the current tire pressure is applied to the interior of the valve cap from the tire valve which is then opened.
  • At least one channel 11 is recessed in the pressure plate 10, via which a pressure medium connection between the open tire valve and the interior of the valve cap is established.
  • a circumferential groove can be recessed on the outer circumference of the pressure plate 10, into which a seal 13, for example an O-ring, is inserted, which seals the pressure plate 10 against the inner circumferential wall of the housing 1.
  • a seal (not shown) could be provided which interacts with the valve tube 6 of the tire valve.
  • a sleeve 20 is arranged displaceably within the housing 1 adjacent to the pressure plate 10.
  • This sleeve 20 has a groove 21 on its outer circumference and on its inside a circumferential shoulder 22.
  • a board 23 is supported, on which the electrical and / or electronic components 24, 24 ', 24 ⁇ , 24' ⁇ of a transmitter are located.
  • This transmitter includes a transmitter coil 25 designed as a wire winding, which is accommodated within the groove 21 on the outer circumference of the sleeve 20.
  • a button cell 26 is accommodated in the interior of the sleeve 20.
  • a can 30 is arranged displaceably within the valve cap housing 1 adjacent to the sleeve 20.
  • This can 30 consists of a can bottom 31 and a can peripheral wall 32 which has an end face 35.
  • a membrane 40 is clamped on the inner periphery of the can peripheral wall 32, in the center of which a metal plate 41 is attached.
  • a reference chamber 44 is created which is delimited by the membrane 40, the can bottom 31 and the can peripheral wall 32.
  • a channel 36 is recessed in the can peripheral wall 32, which begins at the end face 35 of the peripheral can wall 32 and opens into the reference chamber 44. The reference chamber 44 can be subjected to the desired tire pressure through this channel 36.
  • annular seal 45 On the inside of the housing cover 2, an annular seal 45 is attached, which has a sealing surface 46 parallel to the end face 35. If the end face 35 abuts this sealing surface 46 under contact pressure, the channel 36 is blocked and the reference chamber 44 is closed in a pressure-tight manner.
  • a pressure chamber 48 is formed adjacent to the reference chamber 44 and is delimited by the membrane 40, a section of the can peripheral wall 32 projecting beyond the membrane 40 and a plate 47.
  • An elastic member 49 such as a plate spring or a compressible rubber ring, is inserted between the plate 47 and the housing cover 2. Pressure is applied to the pressure chamber 48 via at least one notch in the end face 35 or not shown, or through a transverse bore 33 in the section of the can peripheral wall 32 which projects beyond the membrane there is a non-lockable fluid connection between the pressure chamber 48 and the opened tire valve.
  • the can 30 is preferably permanently connected to the sleeve 20, and both together form a uniform signal generating device with a pressure detection and transmission part.
  • a conductor section 28 which is arranged at a short distance from the rest position of the membrane 40. This conductor section 28 is connected to the transmitter circuit via a first line. A metal plate 27 attached to the membrane 40 is connected to the transmitter circuit via a second line.
  • valve cap When the valve cap is screwed onto a tire valve, there is first a pressure-tight seal between the external thread on the valve tube 6 and the internal thread 5 on the sleeve section 4 of the valve cap housing 1. As the valve member 7 is screwed on further, it is depressed and pressure medium can escape from the open tire valve into the Flow inside the valve cap. The pressure medium acts on both the reference chamber 44 and the pressure chamber 48 with the current tire pressure serving as the target pressure. When screwing on further, the end face of the valve tube 6 abuts the underside of the pressure plate and the end face 35 of the can 30 is pressed against the annular seal 45 and the channel 36 is closed. The reference chamber 44 is acted upon and closed by the predetermined target pressure.
  • the pressure in the pressure chamber 48 also drops.
  • the membrane 40 is deflected into the pressure chamber 48 and there is an electrically conductive contact between the conductor section 28 and the metal plate 27, which together form a mechanical actuated, electrical switch form.
  • a current flows which activates the circuit of the transmitter, whereupon the transmitter transmits one or more signal frequencies for a limited period of time until the digital circuit automatically the signal transmission stops again.
  • valve cap If the valve cap is then unscrewed from the tire valve, the end face 35 of the can 30 is separated from the annular seal 45 by the spring force of the elastic member 49 and pressure equalization occurs between the pressure chamber 48 and the reference chamber 44. The membrane resumes its rest position and the metal plate 27 is separated from the conductor section 28. The valve cap is ready for use again.
  • a practical embodiment of the valve cap shown in the figure has a length (in the direction of the valve axis) of approximately 20 mm and a diameter of approximately 20 mm and weighs less than 10 g (including the button cell).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
EP90117410A 1989-09-12 1990-09-10 Eine, ein Druckabnahmesignal erzeugende Ventilkappe für einen Luftreifen Withdrawn EP0417704A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3930480 1989-09-12
DE3930480A DE3930480A1 (de) 1989-09-12 1989-09-12 Eine ein druckabnahmesignal erzeugende ventilkappe fuer einen luftreifen

Publications (1)

Publication Number Publication Date
EP0417704A1 true EP0417704A1 (de) 1991-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117410A Withdrawn EP0417704A1 (de) 1989-09-12 1990-09-10 Eine, ein Druckabnahmesignal erzeugende Ventilkappe für einen Luftreifen

Country Status (5)

Country Link
US (1) US5040562A (ja)
EP (1) EP0417704A1 (ja)
JP (1) JP2756863B2 (ja)
CA (1) CA2024827C (ja)
DE (1) DE3930480A1 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939017A1 (fr) 2006-12-29 2008-07-02 Siemens VDO Automotive S.A.S. Unité électronique de mesure de paramètres de fonctionnement d'un pneumatique monté sur une roue de véhicule
WO2009077752A1 (en) * 2007-12-17 2009-06-25 Opus Project Management Limited Measuring tyre pressure
WO2016131638A1 (de) * 2015-02-18 2016-08-25 Huf Hülsbeck & Fürst Gmbh & Co. Kg Sensor für ein reifendruckkontrollsystem
EP3421270A1 (en) * 2017-06-28 2019-01-02 Sram, Llc. Pressure measuring device
US10919346B2 (en) 2017-06-28 2021-02-16 Sram, Llc Pressure measuring device for a wheel
EP3792085A1 (de) * 2019-09-10 2021-03-17 TireCheck GmbH Reifendrucksensor und anordnung mit einem reifenventil und einem reifendrucksensor

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902644A1 (de) * 1989-01-30 1990-08-02 Bosch Gmbh Robert Reifendruckueberwacher fuer fahrzeuge
US5231872A (en) * 1991-02-21 1993-08-03 Ttc/Truck Tech Corp. Tire monitoring apparatus and method
DE4133993C2 (de) * 1991-10-14 1994-06-09 Rainer Achterholt Vorrichtung zum Messen und Anzeigen des Druckes in einem Luftreifen
DE4133991C2 (de) * 1991-10-14 1994-05-05 Rainer Achterholt Ein Drucksignal erzeugende Ventilkappe für einen mit einem Reifenventil ausgerüsteten Luftreifen
US5441830A (en) * 1992-10-29 1995-08-15 Moulton; Russell D. Electrically-conducting adhesion-promoters on conductive plastic
DE4303591C2 (de) * 1993-02-08 1996-02-22 Alpha Beta Electronics Ag Ventilkappe mit einer Einrichtung zur Erzeugung eines Druckanzeigesignals für einen mit einem Ventil ausgerüsteten Fahrzeugreifen
US5473938A (en) * 1993-08-03 1995-12-12 Mclaughlin Electronics Method and system for monitoring a parameter of a vehicle tire
US5365967A (en) * 1993-11-03 1994-11-22 Capital Data Safety tire valve
US5581023A (en) * 1994-10-31 1996-12-03 Handfield; Michael Pressure transducer for monitoring a pneumatic tire
JPH08178784A (ja) * 1994-12-22 1996-07-12 Pacific Ind Co Ltd タイヤ空気圧警報装置
AUPN133795A0 (en) * 1995-02-23 1995-03-16 Cohen, Phillip Tyre pressure telemetry system
GB9509840D0 (en) * 1995-05-16 1995-07-12 Hines Wragg John A Pressure sensing devices
US5853020A (en) 1995-06-23 1998-12-29 Widner; Ronald D. Miniature combination valve and pressure transducer and system
DE19534616B4 (de) * 1995-09-18 2007-01-11 Alpha-Beta Electronics Ag Reifendruck-Überwachungseinrichtung
US5635691A (en) * 1995-09-25 1997-06-03 Ballyns; Jan Pneumatic pressure sensor switch device for a vehicle tire
GB9803749D0 (en) * 1998-02-23 1998-04-15 Xpertech Ltd Tyre pressure sensor and warning system
US6005480A (en) * 1998-05-20 1999-12-21 Schrader-Bridgeport International, Inc. Tire valve and associated tire pressure sending unit
US6034596A (en) * 1998-09-15 2000-03-07 Smith; Julian Motor vehicle tire pressure and temperature sensing system
US6340929B1 (en) * 1998-11-19 2002-01-22 Pacific Industrial Co., Ltd Transmitter and external controller of tire inflation pressure monitor
DE19917360A1 (de) * 1999-04-16 2000-10-19 Tomalla Jutta Vorrichtung zur Meldung eines Reifenschadens an einem Fahrzeugrad
US6407662B1 (en) 1999-04-29 2002-06-18 Fernando Gomez De Sebastian System to monitor conditions in a fluid-containing member
GB2352814B (en) * 1999-07-28 2003-04-09 Transense Technologies Plc Pressure monitor system
DE10014076B4 (de) * 2000-03-22 2004-12-09 Nolex Ag Reifenluftdruck-Anzeigevorrichtung
US7161476B2 (en) 2000-07-26 2007-01-09 Bridgestone Firestone North American Tire, Llc Electronic tire management system
US8266465B2 (en) 2000-07-26 2012-09-11 Bridgestone Americas Tire Operation, LLC System for conserving battery life in a battery operated device
US6629454B2 (en) * 2000-11-21 2003-10-07 Lundqvist Torbjoern Boson Tire pressure monitoring device
US6762677B2 (en) * 2002-01-28 2004-07-13 Tyresonic, Inc. Alert device for pneumatic object
EP1344658A1 (de) * 2002-03-12 2003-09-17 Siemens Aktiengesellschaft Vorrichtung zum Erfassen des Reifendrucks eines Kraftfahrzeugreifens
US6843115B2 (en) * 2002-06-05 2005-01-18 Robert Rutherford Air pressure gauge assembly for continuous monitoring of tire inflation pressure
ITBO20020789A1 (it) * 2002-12-16 2004-06-17 Giovanni Barbanti Sistema di trasmissione di un segnale indicante lo
JP2004294413A (ja) * 2003-02-12 2004-10-21 Pacific Ind Co Ltd 圧力センサ、送信機、及びタイヤ状態監視装置
JP2004245622A (ja) * 2003-02-12 2004-09-02 Pacific Ind Co Ltd 圧力センサ、送信機、及びタイヤ状態監視装置
CA2545178A1 (en) * 2003-11-17 2005-05-26 Sst Wireless Inc. Machine body antenna
US7574920B2 (en) * 2005-01-18 2009-08-18 Rutherford Robert B Tire pressure gauge with sensor support
US7237439B1 (en) * 2005-02-23 2007-07-03 Rutherford Robert B Pressure sensor over-pressure protection
US7509849B2 (en) 2005-04-27 2009-03-31 Rutherford Robert B Tire pressure gauge with data transmitter
US7284419B2 (en) * 2005-05-25 2007-10-23 Rutherford Robert B Temporary attachment tire pressure gauge
DE102005037600A1 (de) * 2005-08-05 2007-02-08 Drescher, Rüdiger Ventilklappe
US7336164B2 (en) * 2006-02-23 2008-02-26 Dymos Co., Ltd. Tire pressure monitoring system and sensor therefor
US7421902B2 (en) * 2006-10-13 2008-09-09 Smartire Systems, Inc. Fluid pressure sensing method and apparatus
US7764168B1 (en) * 2007-05-04 2010-07-27 Mobiletron Electronics Co., Ltd. Tire pressure monitoring system with a capped tire valve
US7741964B2 (en) * 2007-05-31 2010-06-22 Schrader Electronics Ltd. Tire pressure detector having reduced power consumption mechanism
TWI334242B (en) * 2007-10-19 2010-12-01 En Min Jow Antenna structure for tpms transmitter
KR100921097B1 (ko) * 2007-12-15 2009-10-08 현대자동차주식회사 차량의 티피엠에스센서
CN101791932B (zh) * 2009-02-01 2011-12-07 傅黎明 一种爆胎胎压监测模块
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CN102358115A (zh) * 2011-09-13 2012-02-22 广东铁将军防盗设备有限公司 外置式胎压传感装置及其密封通气件
CN102632775B (zh) * 2012-04-18 2014-03-12 广东铁将军防盗设备有限公司 外置式胎压计及其安装结构和相应的装卸工具
JP6328294B1 (ja) * 2017-04-28 2018-05-23 森　啓二 タイヤ空気圧警報器
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB892201A (en) * 1958-09-24 1962-03-21 Angelo Ricchini An acoustic warning device for attachment to the valve of a pneumatic tyre to indicate loss of pressure
GB2171525A (en) * 1985-02-21 1986-08-28 Labinal Device for measuring brake temperatures and tire pressures of sets of wheels of vehicles and in particular aircraft
DE3546338C1 (de) * 1985-12-30 1987-06-04 Rainer Achterholt Eine Druckminderungsanzeige liefernde Ventilkappe fuer Luftreifen
WO1988003879A1 (en) * 1986-11-20 1988-06-02 Robert Bosch Gmbh Inflation pressure sensor for motor vehicles
DE3738413C1 (en) * 1987-11-12 1989-02-16 Bosch Gmbh Robert Tyre pressure sensor for motor vehicles
WO1989005239A1 (en) * 1987-12-04 1989-06-15 Robert Bosch Gmbh Tyre pressure sensor for motor vehicles

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215978A (en) * 1961-12-28 1965-11-02 Magnavox Co Vehicle tire pressure alarm system
US3430196A (en) * 1966-06-16 1969-02-25 Rd Products Tire pressure indicator
US3533063A (en) * 1966-12-09 1970-10-06 George E Garcia Low pressure pneumatic tire transmitter
US3713092A (en) * 1970-10-23 1973-01-23 B Ivenbaum Air pressure balanced self-contained tire pressure condition signal transmitter
DE2441430C2 (de) * 1973-10-01 1983-01-05 Bridgestone Tire Co. Ltd., Tokyo Vorrichtung zur Anzeige eines Druckverlustes in einem mit Druckluft gefüllten Reifen eines Fahrzeugs
FR2308518A1 (fr) * 1975-04-21 1976-11-19 Michelin & Cie Perfectionnements aux detecteurs de variation de la pression de gonflage de pneumatiques
US4048614A (en) * 1975-08-18 1977-09-13 Shumway Harry J Low tire pressure warning device
US4037192A (en) * 1976-07-19 1977-07-19 The Raymond Lee Organization, Inc. Flat tire indicating device
DE2652122A1 (de) * 1976-11-16 1978-05-18 Vdo Schindling Einrichtung zum uebertragen von messwerten
US4363020A (en) * 1980-12-22 1982-12-07 Borg-Warner Corporation Interrogating system for remotely monitoring tire air pressure
DE3108998A1 (de) * 1981-03-10 1983-01-13 Robert Bosch Gmbh, 7000 Stuttgart Pneumatisch betaetigbarer druckschalter zur reifendruckueberwachung
US4737760A (en) * 1984-12-06 1988-04-12 Huang Chung Siung Tire pressure warning device
DE3605661A1 (de) * 1985-02-22 1986-08-28 Elaine Ruth Healesville Victoria Burge Alarmvorrichtung
DE3543864A1 (de) * 1985-12-12 1987-06-19 Bosch Gmbh Robert Reifendrucksensor fuer kraftfahrzeuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB892201A (en) * 1958-09-24 1962-03-21 Angelo Ricchini An acoustic warning device for attachment to the valve of a pneumatic tyre to indicate loss of pressure
GB2171525A (en) * 1985-02-21 1986-08-28 Labinal Device for measuring brake temperatures and tire pressures of sets of wheels of vehicles and in particular aircraft
DE3546338C1 (de) * 1985-12-30 1987-06-04 Rainer Achterholt Eine Druckminderungsanzeige liefernde Ventilkappe fuer Luftreifen
WO1988003879A1 (en) * 1986-11-20 1988-06-02 Robert Bosch Gmbh Inflation pressure sensor for motor vehicles
DE3738413C1 (en) * 1987-11-12 1989-02-16 Bosch Gmbh Robert Tyre pressure sensor for motor vehicles
WO1989005239A1 (en) * 1987-12-04 1989-06-15 Robert Bosch Gmbh Tyre pressure sensor for motor vehicles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INGENIEURS DE L'AUTOMOBILE. no. 8, November 1984, BOULOGNE FR Seiten 86 - 91; G Beghin et al: "Mesure de pression et surveillance de pneumatiques" *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939017A1 (fr) 2006-12-29 2008-07-02 Siemens VDO Automotive S.A.S. Unité électronique de mesure de paramètres de fonctionnement d'un pneumatique monté sur une roue de véhicule
FR2910843A1 (fr) * 2006-12-29 2008-07-04 Siemens Vdo Automotive Sas Unite electronique de mesure de parametres de fonctionnement d'un pneumatique monte sur une roue de vehicule
WO2009077752A1 (en) * 2007-12-17 2009-06-25 Opus Project Management Limited Measuring tyre pressure
US8291756B2 (en) 2007-12-17 2012-10-23 Opus Project Management Limited Measuring tyre pressure
WO2016131638A1 (de) * 2015-02-18 2016-08-25 Huf Hülsbeck & Fürst Gmbh & Co. Kg Sensor für ein reifendruckkontrollsystem
EP3421270A1 (en) * 2017-06-28 2019-01-02 Sram, Llc. Pressure measuring device
TWI680890B (zh) * 2017-06-28 2020-01-01 美商速聯有限責任公司 壓力測量裝置
US10703146B2 (en) 2017-06-28 2020-07-07 Sram, Llc Pressure measuring device with alignment feature
US10919346B2 (en) 2017-06-28 2021-02-16 Sram, Llc Pressure measuring device for a wheel
EP3421270B1 (en) 2017-06-28 2021-07-14 Sram, Llc. Pressure measuring device
US11535069B2 (en) 2017-06-28 2022-12-27 Sram, Llc Pressure measuring device for a bicycle
EP3792085A1 (de) * 2019-09-10 2021-03-17 TireCheck GmbH Reifendrucksensor und anordnung mit einem reifenventil und einem reifendrucksensor

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CA2024827A1 (en) 1991-03-13
DE3930480A1 (de) 1991-03-14
DE3930480C2 (ja) 1992-04-16
JP2756863B2 (ja) 1998-05-25
US5040562A (en) 1991-08-20
JPH03178811A (ja) 1991-08-02
CA2024827C (en) 2001-02-13

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